High altitudes make cookies spread in the pan, cakes fall, and few baked goods turn out as they do at sea level. This twice-monthly column presents recipes and tips that make baking in the mountains ...

6 tablespoons unsalted butter, cut >into 1/2-inch cubes and chilled> For filling: 1 (3-ounce) package cream cheese, >cut into chunks> 1/4 cup plus 2 tablespoons >superfine sugar> To prepare tartlet ...